They feel that god put them into the wrong body, or grew up differently than other boys. They also like hanging around girl's and being like one of the girls, instead of one of the boy's. They might like the girl's clothing, how their treated by boy's, or like's boy's instead of girl's and want's to be liked as a girl. There are many reason's why a boy want's to be a girl. Or maybe the boy feel's that a girl's life is much easier, which is sometime's not.
They would feel better as a girl . They were born that way and they may be gay.
People are entitled to be what sex gender they want - no one can stop anyone .